package customerEnter.Frame.Utils;

import javax.servlet.http.HttpServletRequest;

/**
 * 从页面中取得用户的真实Ip地址
 * @author Administrator
 */
	/** 
	 * 自定义访问对象工具类 
	 * 
	 * 获取对象的IP地址等信息 
	 * @author X-rapido 
	 * 
	 */ 
	public class HttpRequestIpUtil { 
	 
	  /** 
	   * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址, 
	   * 
	   * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？ 
	   * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。 
	   * 
	   * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130, 
	   * 192.168.1.100 
	   * 
	   * 用户真实IP为： 192.168.1.110 
	   * 
	   * @param request 
	   * @return 
	   */ 
//	  public static String getIpAddress(HttpServletRequest request) { 
//	    String ip = request.getHeader("x-forwarded-for"); 
//	    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
//	      ip = request.getHeader("Proxy-Client-IP"); 
//	    } 
//	    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
//	      ip = request.getHeader("WL-Proxy-Client-IP"); 
//	    } 
//	    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
//	      ip = request.getHeader("HTTP_CLIENT_IP"); 
//	    } 
//	    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
//	      ip = request.getHeader("HTTP_X_FORWARDED_FOR"); 
//	    } 
//	    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
//	      ip = request.getRemoteAddr(); 
//	    } 
//	    return ip; 
//	  } 
		public static String getIpAddress(HttpServletRequest request) {
			  if (request.getHeader("x-forwarded-for") == null) {
			   return request.getRemoteAddr();
			  }
			  return request.getHeader("x-forwarded-for");
			}
}
